Each week, Digital Spy rounds up the biggest mobile gaming releases with reviews and trailers. This week's games include addictive number puzzles, a stylistic planetary puzzle sequel and an homage to an infamous arcade game.

It starts by sliding tiles marked with a 1 and 2 together to make a 3 tile, and from there tiles with the same number can be combined to make 6, 12, 24, and so on.

For a game about matching numbered tiles, it is ridiculously charming. Each number is a character with its own voice, and offers happy encouragement as you continue to slide the puzzle and combine pairs.

Each time you slide the puzzle a new tile also enters the board, making it a race to create as many high matches as you can before the board fills entirely.

And while you can simply slide tiles to make quick pairs, to reach higher matches takes more patience and careful planning that feels incredibly rewarding when you finally pull it off.

Don't let the appearance of maths fool you, Threes is a deceptively addictive game of sliding, matching and growing the puzzle with every move.

Eliss Infinity is a semi-sequel to the stylish puzzle game Eliss, which was among the earliest games to take full advantage of the iPhone's multi-touch screen.

The core of the game is simple, as players have to guide various colored orbs into their same-colored goals. You have to not only match the color but the size of the goal as well, with the ability to both combine same-colored orbs to make them bigger or pull an orb apart with two fingers to form two smaller ones.

As the name suggests, the new infinity mode is the main draw for Eliss Infinity, challenging players to survive as long as possible against an endless supply of orbs.

Also included are all of the levels from the original Eliss which is an especially nice bonus for iPad users since the original game was never updated to run natively on iPads.

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The minimalist visuals and soothing sounds of Eliss Infinity hide a deviously challenging and rewarding puzzle game, but those who already played the original Eliss can safely pass on the semi-sequel unless they are desperate to play on an iPad.